1260879920domain: NAppears in sequencesDenominators of continued fraction convergents to sqrt(99).at n=15A041179Denominators of continued fraction convergents to sqrt(891).at n=21A042723Numbers k such that 99*k^2 + 1 is a square.at n=8A075843128*n^7-192*n^5+80*n^3-8*n.at n=10A242852